Original Paper

UDC 552.574 E.S. Prokopyev, S.A. Prokopyev, O.L. Alekseeva, 2023

ISSN 0041-5790 (Print) ISSN 2412-8333 (Online) Ugol  Russian Coal Journal, 2023, S12, pp. 103-106 DOI:




Prokopyev E.S.1,2, Prokopyev S.A. 1,2, Alekseeva O.L. 1,2

1 Institute of the Earths Crust of SB RAS, Irkutsk, 664033, Russian Federation

2 LLC Research and Production Company Spirit, Irkutsk, 664033, Russian Federation

Authors Information

Prokopyev E.S., Junior Researcher of the Department of Integrated Use of Mineral Raw Materials, Director for Technology and Innovation, e-mail:

Prokopyev S.A., PhD (Engineering), Head of the Department of Integrated Use of Mineral Raw Materials, Chief Executive Officer, e-mail:

Alekseeva O.L., Leading Engineer of the Department for Integrated Use of Mineral Raw Materials, Director of Economics and Finance, e-mail:


The presented article discusses the use of gravitational enrichment methods for coal mining waste, namely screw separation. Since the equipment has a difference in its design, the authors of the article provide comparative data on the operation of two types of devices, the testing of which was carried out on the same raw materials.


Coal sludge, Enrichment of coal sludge, Operating parameters, Granulometric analysis, Screw separation.


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2. Novak V.I. & Kozlov V.A. An overview of modern methods of coal sludge preparation. Gornyj informatsionno-analiticheskij byulleten', 2012.

3. Belousov V.A. Promising methods of coal sludge processing. Mezhdunarodnyj zhurnal prikladnykh i fundamental'nykh issledovanij, 2014, (4), pp. 15-17. (In Russ.).

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5. Prokopyev S.A. Overview of coal sludge gravity concentration technologies. Nauki o Zemle i nedropol'zovanie, 2022, Vol. 45, (4), pp. 458-468. (In Russ.).

6, Ivanov V.D. & Prokopyev S.A. Screw machines for ore and sand processing in Russia. Monograph. Moscow, Daxi Publ., 2000, pp. 239-241. (In Russ.).

7. Anikin M.F., Ivanov V.D. & Pevzner M.L. Screw machines for ore processing. Monograph. Moscow, Nedra Publ., 1970, pp. 170-172. (In Russ.).

8. Yashin A.V., Anikin M.F. & Skripko V.A. Separator of screw machines. Monograph. Moscow, Nedra Publ., 1984, pp. 102-103. (In Russ.).


The research was performed as part of the Integrated Scientific and Technical Programme of the Ministry of Science and Higher Education of the Russian Federation 075-15-2022-1192 Processing of coal mill tailings in order to obtain commercial coal concentrate with support of the Development and implementation of complex technologies in the areas of exploration and extraction of minerals, industrial safety, bioremediation, creation of new deep conversion products from coal raw materials while consistently reduc? ing the environmental impact and risks to human life Integrated Scientific and Technical Programme of the Full Innovation Cycle, approved by Order No 1144- of the Government of the Russian Federation on May 11, 2022.

For citation

Prokopyev E.S., Prokopyev S.A. & Alekseeva O.L. Research results of different types of screw separators for coal mining waste. Ugol, 2023, (S12), pp. 103- 106. (In Russ.). DOI: 10.18796/0041-5790-2023-S12-103-106.

Paper info

Received November 1, 2023

Reviewed November 15, 2023

Accepted November 30, 2023